Core ring for use in a mold stack



FIG. 1 depicts a top perspective view of the core ring for use in a moldstack;

FIG. 2 depicts a bottom perspective view of the core ring for use in amold stack of FIG. 1;

FIG. 3 depicts a side view of the core ring for use in a mold stack ofFIG. 1;

FIG. 4 depicts a top view of the core ring for use in a mold stack ofFIG. 1; and,

FIG. 5 depicts a top view of the core ring for use in a mold stack ofFIG. 1.

The ornamental design for a core ring for use in a mold stack, as shownand described.